Day4 and Day5 solution Added

day4.java

@@ -0,0 +1,44 @@
+import java.io.*;
+import java.util.*;
+public class Person {
+    private int age;	
+
+	public Person(int initialAge) {
+  		// Add some more code to run some checks on initialAge
+        age = initialAge;
+        if (age < 0) {
+            System.out.println("Age is not valid, setting age to 0.");
+            age = 0;
+        }
+	}
+
+	public void amIOld() {
+  		// Write code determining if this person's age is old and print the correct statement:
+        if (age < 13) 
+            System.out.println("You are young.");
+        else if (age >= 13 && age < 18) 
+            System.out.println("You are a teenager.");
+         else 
+            System.out.println("You are old.");
+	}
+
+	public void yearPasses() {
+  		// Increment this person's age.
+        age++;
+	}
+public static void main(String[] args) {
+		Scanner sc = new Scanner(System.in);
+		int T = sc.nextInt();
+		for (int i = 0; i < T; i++) {
+			int age = sc.nextInt();
+			Person p = new Person(age);
+			p.amIOld();
+			for (int j = 0; j < 3; j++) {
+				p.yearPasses();
+			}
+			p.amIOld();
+			System.out.println();
+        }
+		sc.close();
+    }
+}

day5.java

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+import java.io.*;
+import java.math.*;
+import java.security.*;
+import java.text.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.regex.*;
+
+public class Solution {
+
+
+
+    private static final Scanner scanner = new Scanner(System.in);
+
+    public static void main(String[] args) {
+        int n = scanner.nextInt();
+        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
+        for(int i=1;i<=10;i++){
+            System.out.println(n+" x "+i+" = "+n*i);
+        }
+
+        scanner.close();
+    }
+}